JPS5920405Y2 - Road telescopic connection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a road expansion/contraction connection device suitable for running vehicles having caterpillars such as graders.

Conventionally, as a road expansion/contraction connection device, an expansion joint is constructed by embedding a metal reinforcing member in a rubber joint body consisting of an expansion and contraction part and mounting parts connected on both sides of the rubber joint body, and the expansion joint (
There is a known type in which the mounting part of the stand is placed on a metal holding member and fixed with a bolt inserted into the mounting part from above.

However, in the case of this type of road expansion/contraction connection device, although the amount of expansion and contraction is relatively small, the width of the elastic material such as rubber in the expansion joint is considerably large, and therefore, metal caterpillars such as graders etc. When a vehicle passes by, the weight of the vehicle acts directly on the elastic material of the expansion joint through the metal tracks, causing premature wear or damage to the expansion joint.

The object of this invention is to provide a road expansion connection device which advantageously solves the above-mentioned problems and allows the expansion joint to be easily attached and detached.

Next, this invention will be explained in detail using illustrated examples.

FIGS. 1 and 2 show an expansion joint 1 used in an embodiment of the invention, in which an expansion joint 13 made of an elastic material such as rubber has a hollow hole 10, an upper groove 11, and a lower groove 12. A metal support member 14 extending in the longitudinal direction is embedded and fixed on both sides of the elastic member 13, and a metal support member 14 extending in the longitudinal direction of the elastic member 13 is embedded and fixed in the upper and lower portions of both sides of the elastic member 13 in the longitudinal direction at a position facing the flange of the support member 6. A water-stop ridge 15 is provided that extends continuously from the supporting member 6, and a large number of threaded holes 16 are provided at regular intervals in the longitudinal direction of the supporting member 6. The ends are provided with grooves 17 and protrusions 18 for fittingly connecting adjacent expansion joints to each other.

Figures 3 to 5 show the metal holding member 3 used in the embodiment of this invention, and the width of the horizontal strip-shaped bottom plate 20 having air vent holes 19 when fixing and paving material is cast. A vertical strip-shaped inner holding plate 4 extending in the longitudinal direction of the bottom plate is fixed by welding to one side of the bottom plate 20, and an outer holding plate 4 extending in the longitudinal direction of the bottom plate is fixed to the other side of the bottom plate 20 in the width direction. The lower part of 21 is fixed by welding,
The upper surface of the inner holding plate 4 is lower than the upper surface of the outer holding plate 21, and the bottom plate 20. The inner holding plate 4 and the outer holding plate 21 constitute a metal holding member 3 having an upward opening 2.

A large number of metal string threaded portions (9) consisting of a metal plate having a through hole and nuts fixed to the lower surface of the metal plate by welding are arranged at intervals in the longitudinal direction of the holding member 3 (in the upper part of the upward opening groove 2 at the end). Each female threaded member 9 is fixed to the inner holding plate 4 and the outer holding plate 21 by welding, and the inner holding plate 4 has a large number of through holes 22 for bolt insertion, which are fixed in the longitudinal direction of the holding plate. They are provided at intervals, and the bolt insertion through holes 22 are arranged in the middle between adjacent female screw members 9.

In addition, on the side surface of the inner retaining plate 4 on the outside of the groove, a large number of joint support plates 23 are arranged at intervals in the longitudinal direction of the retainer plate and are fixed by welding, and the lower surface of the joint support plate 23 and the lower part of the inner retainer plate are connected to each other. A rib 24 is fixed by welding over the entire length.

An inverted U-shaped anchor reinforcing bar 25 is fixed to the holding member 3 by welding, and a metal connecting plate 26 for connecting adjacent holding members with bolts is fixed to the end of the outer holding plate 21 by welding. The connecting plate 26 is provided with a bolt insertion hole 27, and the joint support plates 23 of the opposing inner holding plate 4 are arranged to be offset in the longitudinal direction of the holding member by the distance between the joint support plates. There is.

6 and 7 show the usage state of the road expansion and contraction connection device according to the embodiment of this invention, in which the inner holding plates 4 of the holding member 3 are in contact with both sides of the expansion joint 1, and the expansion and contraction The joint 1 is placed on the joint support plate 23 of the holding member 3 facing the joint 1, and the support bolt 5 inserted into the through hole of the inner holding plate 4 is screwed into the female screw hole 16 of the support member 6 of the expansion joint 1. A metal lid 7 extending in the longitudinal direction of the holding member is placed on the upper surface of each female threaded member 9 and the inner holding plate 4, and the lid 7 has a position opposite to the screw hole of the female threaded member 9. In the truncated conical bolt head accommodating part 2
A bolt hole with a countersunk head 8 is provided.
is inserted into a bolt hole of the lid 7 and screwed onto the female thread member 9.

The side part of the road expansion/contraction connection device is arranged on the lead-in step part 30 provided on the upper surface of the end of the road body 29, and the anchor reinforcing bar 25 is attached to the straightening reinforcing bar 31 embedded and fixed in the road body 29. On the other hand, the lower part of the formwork material 32, which is fixed by welding and has a low compressive strength and is made of synthetic resin foam, is the road main body 29.
A fixing/paving material 33 such as concrete or asphalt is placed on top of the lead-in step 30, and the top surface of the expansion joint 1 is placed at a lower level than the top surface of the lid 7. Lid 7. Outer retaining plate 21. The upper surfaces of the fixed and paving material 33 and the paving material 34 are arranged at the same level.

When implementing this invention, a steel plate with a tapped hole may be used as the screw member.

Further, as the metal material, for example, steel is used.

According to this invention, since the expansion joint 1 is not provided with a mounting portion that extends in the lateral direction, the width of the expansion joint 1 can be reduced, and the metal cover 7 is attached to both sides of the expansion joint 1. Since the holding member 3 made of metal is provided, the tracks of a vehicle having tracks do not ride directly on the elastic material of the expansion joint 1, and the vehicle is supported by the holding member 3 made of metal with a metal lid 7. Therefore, it is possible to prevent the elastic material in the expansion joint from being prematurely worn out or damaged by the caterpillar, and when the acquisition bolt 8 is unscrewed and the lid 7 is removed, the upward opening groove 2 in the holding member 3 is removed. Since the support bolt 5 can be rotated by inserting a rotating tool such as a spanner therein, effects such as the ability to easily attach and detach the expansion joint 1 without removing the holding member 3 can be obtained.

[Brief explanation of drawings]

Fig. 1 is a vertical perspective view of an expansion joint used in an embodiment of this invention, Fig. 2 is a side view thereof, and Fig. 3 is a plan view of a metal holding member used in an embodiment of this invention.
4 is a front view thereof, FIG. 5 is a sectional view taken along the line A-A in FIG. FIG. 7 is an enlarged longitudinal sectional front view showing a part thereof. In the figure, 1 is an expansion joint, 2 is an upward opening groove, 3 is a metal holding member, 4 is an inner holding plate, 5 is a support bolt, 6 is a metal support member, 7 is a metal lid, 8 is a mounting bolt, 9 13 is a female screw member, 13 is a telescopic member, 16 is a punch hole, 21 is an outer holding plate, 23 is a joint support plate, 25 is an anchor reinforcing bar, 29
33 is the road body, and 33 is the fixing/paving material.

Claims (1)

[Scope of utility model registration request] An inner holding plate 4 of a metal holding member 3 having an upward opening groove 2 is brought into contact with both sides of an expansion joint 1 arranged along a road expansion joint, and a large number of supports are inserted through the inner holding plate 4. A bolt 5 is screwed into a metal support member 6 of the expansion joint 1, a metal lid 7 is removably placed on top of the holding member 3, and a large number of mounting bolts 8 are inserted through the lid 7. A road telescopic connection device, which is screwed into a large number of female screw members 9 fixed to the holding member 3, and is arranged so that the support bolt 5 and the female screw members 9 do not overlap in the vertical direction.